Roll for textile machinery



Dec. 31, 1929. w. A. TEBO I ROLL FOR TEXTILE MACHINERY Filed Dec. 4, 1928 lnvenT'or WiHiom A.Te b0 w Ariys.

- Patented 31, 1929 omen STATES, PATENT OFFICE WILLIAM A. TEIBO, F ANTHONY, RHODE ISLAND, .ASSIGN OB TO DRAPER CORPORATION,

0]? EOPEDALE, MASSACHUSETTS, A CORIPOBATION OF MAINE ROIJL FOB TEXTILE MACHINERY Application filed December 4, 1928. Serial No. 323,746.

This invention relates to a fabric engaging and gripping roll for use in textile nachmery. Such rolls are employed in various textile machines, familiar instances being the ilrolls employed in loom temples and in the -take-up mechanism of a loom.

The object of'the invention 1s to provide a roll of this type having a novel constructlon of its fabric-engaging periphery by means of 1.which certain important and desirable results are secured. Among these results are the ability of the gripping function of the fabric-engaging surface of the roll to vary with the pressure exerted between the fabric and the roll; the ability of the main body of the peripheral surface of they roll to be de-, pressed at the area of contact between the roll and the fabric so as to relieve the longitudinal tension on the fabric passing about the roll when that tension becomes for any reason greater than normal; the ability to.-increase the gripping function of the roll when the area of contact is depressed; and the production of a roll surface capable of use in connection with fine and delicate fabrics such as silk and rayon without injury thereto, but having suflicient gripping qualities to enable the roll to perform its required function.

These and other objects and features of the invention will appear more fully from the ac companying description and drawings and will be particularly pointed out in the claims. The drawingsillustrate two applications in textile machinery of rolls embodying preferred forms of the invention. In one case the roll is'shown in a loom temple, and in the other case in a loom take-up mechanism. But it is to be understood that such a roll may be employed in any other position where its qual ities are desirable. As the general construction and operation of loom temples and takeup mechanisms are well known and familiar to those skilled in the art, it is only necessary here to illustrate and describe in a very general way such mechanisms. In both cases it will be recognized that clothor fabric passes about, or over a substantial segment of, the roll undera substantial longitudinal tension and, in the former case, under a substantial;

lateral tensionalso. In both cases, it will be recognized also that the roll, in order to perform its functions, must have a firm grip on the cloth or fabric, but without marring or injuring the cloth or fabric.

In the drawings:

Fig. l is a view partially in side elevation and partially in vertical cross section of the front upper portion of a loom showing an ordinary type of temple in position and including an ordinary type of take-up mechanism.

Fig. 21s a plan View partially broken away of the take-up roll shown in Fig. 1 and embodying a preferred form of the present invention.

Fig. 3 is a view on a larger scale in cross section of a small portion of a take-up roll such as shown in Figs. 1 and 2 with the cloth in engagement therewith.

Fig. 4: is a perspective view partially broken away of a temple roll embodying a preferred form of the invention with the cover in process of application. to the core.

In the loom construction illustrated, there is shown one of the side frames 1 with the breast beam 2 and the false breast beam 3. A temple 4 is shown mounted on the false beam 3 and as usual has journalled in its head the temple roll 5.. A. take-up r0116 is also shown carrred by the usual positively driven shaft 7. The cloth 8 is shown as passing through the temple beneath and about the temple roll 5, thence over the breast beam 2, thence around a guide roll 9, thence about a large segment of the take-up roll 6, thence over another. guide roll 10 and thence to the cloth roll 11 upon which it is wound.

The temple roll, constructed in accordance with a preferred form of the invention, is shown separatel in Fig. 4.. It comprises essentially a rigid cylindrical core 12 preferably made of wood and having the usual bore 13 by means of which it is jourhalled in the tem le head. The-periphery of this core is stu ded with generally radially projecting, pointed metal teeth 14. In the case of the temple roll, these teeth are usually inclined s'lightlyaway from. the center of the loom because a temple roll acts to hold the fabric stretched laterally. These teeth are rigidly secured to the core preferably by being set therein. The core and teeth of the temple roll may therefore be formed substantially inaccordance with the usual practice in temple pin rolls. A cover 15 of soft rubber is mounted on the core and is shown in the form of a rubber sleeve which may be placed on the core by rolling it on from one end. In Fig. 4 the portion 16 of the core is shown being rolled on toward the right-hand'end. This soft rubber cover normally envelops the metal teeth so that these teeth are embedded in the core with their points located adjacent the periphery of the cover and preferably projecting very slightly from this periphery.

The temple roll thus presents a peripheral surface of two distinct parts, namely the main body surface of the soft rubber and the scattered points of the metal teeth. With the cloth running about the roll and under tension both longitudinally and laterally, both parts of the surface exert a gripping function. The surface of the rubber has very des'irable gripping qualities of itself and will not injure fine and delicate fabrics. The points of the teeth when thus projecting very slightly afford an additional firm grip upon the fabric but without injuring the same. When, however,the longitudinal tension on the cloth increases beyond the normal amount, the rubber covered surface at the area of its contact with the cloth is depressed. This depression both acts to relieve the increase in normal longitudinal tension of the fabric and also to expose a greater amount of the metal teeth and thus increase the grip of the roll on the cloth. Consequently such a roll surface acts to equalize uneven tension on the warps forming the cloth while at the same time providing the necessary gripping function. Immediately the longitudinal tension at any point is restored to normal, the rubberexpands to its original position, thus restoring the original action between the points of the metal teeth and the cloth.

The construction illustrated for the takeu roll in Figs 2 and 3 is of the same general 0 aracter. The take-up roll is. here ,shown as having a rigid cylindrical shell-like core 17 which may be formed of wood or metal. Pointed metal teeth 18 similar to those already described are rigidly secured in this shell and project radially therefrom. The

soft rubber cover 19 may be of the same character as that described in connection with the temple roll and may be placed on the core in the same way. The take-up roll is shown as positively driven and the cloth passing about this take-up roll is under very sub stantial longitudinal tension because the take-up roll is the means for pulling the cloth through the loom and winding it upon the cloth roll. In Fig. 3 the action of the rubber cover 19 is indicated when the longitudinal tension on the cloth has increased somewhat above normal. It will be exposing a greater portion of the points of the metal teeth 18. This, as noted, not only relieves the tension on the cloth, but at the same time increases the gripping function of I the roll. Thus any unevenness in the tension on the warps is taken up by the take-up roll so that the take-up roll automatically adjusts itself to such unevenness of tension. K

There is thus presented bythis invention a simple, practical, easily constructed roll for use in textile machinery having the highly desirable and novel qualities set forth.

While the cover is herein defined as of soft rubber, this term is to be understood as including rubber compounds or substitutes having the yielding and surface frictional or adherent qualities of rubber. While also the cover is preferably in the fornrof a continu ous integral sleeve, the invention in its broader aspects is not to be restricted to this particular construction for forming and holding in place the roll periphery. 4

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is:

1. A roll for use in textile machines comprising a rigid, cylindrical core, a soft rubber cover on the core and radially projecting pointed metal teeth rigid with the core, embeddedin the cover and having their points located adjacent the cover periphery, the said rubber cover yielding under external pressure to expose the metal teeth to an extent determined by the pressure and correspondingly varying the gripping function of the roll periphery.

2. A roll for use in textile machines haying its periphery composed of soft rubber and pointed metal teeth embedded in the rubber and extending in a generally radial direction thus to present a frictional gripping surface composed both of rubber and of metal points in which the amount of frictional grip exerted by the roll is dependent upon the external pressure ,to which the roll is subjected in use determining the extent of projection of the points of the teeth beyond the rubber surface.

3. A roll for use in textile machines having its periphery composed of soft rubber ,and radially extending pointed metal teeth 2 embedded therein with the points of the teeth normally standing adjacent the surface of the rubber and in which the gripping function of the roll is varied by the pressure between the roll and the article ripped thereby acting to vary the extent of projection of the points of the metal teeth beyond the rubber surface.

4. A roll for use in textile machines comprising a rigid, cylindrical core, a rubber cover on the core depressible at the area of contact-with fabric'running about and dev flected by the roll to relieve an increase in the ing extent from the cover surface as that normal longitudinal tension of the fabric,

and radially projecting pointed-metal teeth rigid with the core, embedded in the cover and having their points located adjacent the cover periphery thus to project to an increassurface is depressed and thereby increase the grip of the roll on the fabric.

In testimony whereof, I have signed my name to this specification.

' WILLIAM A. TEBO. 

